A word from Heather, the 'Star-Spangled Halloween' costume creator:

Snowplow our St. Bernard wants to be included in everything and especially Halloween with the children.
He is a 175lb bundle of love to everyone and a certified therapy dog. The costume was created using in part a toddler pattern for the airplane and designing the vintage pilot hat and scarf from a pattern created through trial and error. Snowplow is wearing Doggles.

Snowplow is adorable and I'm sure a big love. The costume seems to be both functional and cute. I can see how a St. Bernard could be both an airplane and a pilot as Snowplow is. Too cute for words, woof.